Tone Matrix Music Box ECE477 – Team 17

Presenter: Chia Siong Goh

Project Overview A music synthesizer that uses the 8x8 grid

of 64 buttons as its user interface to produce sound and emit light.

3 music playing modes:• Sweep mode• Gravity mode• Memory mode

3 kinds of sound effects:guitar, piano, and drum beats

Major Subsections Power supply – 3.3V and 5.0V LED driver chip Audio converter Headers for

• LEDs• Button pads• MIDI jack• Programming port• Debugging• LCD screen• SD card R/W• Accelerometer• Pushbuttons

Layout Considerations Digital signals isolated from analog

signals Wider power and ground traces Decoupling capacitors between

power supply lines I/O pins close to the board edge

Microcontroller

Power Regulator Circuit

Audio converter & LED driver

Appendix - Schematic